1 /* Synchronous subprocess invocation for GNU Emacs.
2 Copyright (C) 1985-1988, 1993-1995, 1999-2012
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
26 #include <sys/types.h>
38 #define _P_NOWAIT 1 /* from process.h */
41 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
43 #include <sys/param.h>
47 #include "character.h"
51 #include "composite.h"
54 #include "syssignal.h"
56 #include "blockinput.h"
58 #include "termhooks.h"
65 extern char **environ
;
71 #define setpgrp setpgid
75 /* Pattern used by call-process-region to make temp files. */
76 static Lisp_Object Vtemp_file_name_pattern
;
78 /* True if we are about to fork off a synchronous process or if we
79 are waiting for it. */
80 int synch_process_alive
;
82 /* Nonzero => this is a string explaining death of synchronous subprocess. */
83 const char *synch_process_death
;
85 /* Nonzero => this is the signal number that terminated the subprocess. */
86 int synch_process_termsig
;
88 /* If synch_process_death is zero,
89 this is exit code of synchronous subprocess. */
90 int synch_process_retcode
;
93 /* Clean up when exiting Fcall_process.
94 On MSDOS, delete the temporary file on any kind of termination.
95 On Unix, kill the process and any children on termination by signal. */
97 /* Nonzero if this is termination due to exit. */
98 static int call_process_exited
;
101 call_process_kill (Lisp_Object fdpid
)
105 CONS_TO_INTEGER (Fcar (fdpid
), int, fd
);
106 CONS_TO_INTEGER (Fcdr (fdpid
), pid_t
, pid
);
108 EMACS_KILLPG (pid
, SIGKILL
);
109 synch_process_alive
= 0;
114 call_process_cleanup (Lisp_Object arg
)
116 Lisp_Object fdpid
= Fcdr (arg
);
124 Fset_buffer (Fcar (arg
));
125 CONS_TO_INTEGER (Fcar (fdpid
), int, fd
);
128 /* for MSDOS fdpid is really (fd . tempfile) */
130 /* FD is -1 and FILE is "" when we didn't actually create a
131 temporary file in call-process. */
134 if (!(strcmp (SDATA (file
), NULL_DEVICE
) == 0 || SREF (file
, 0) == '\0'))
135 unlink (SDATA (file
));
136 #else /* not MSDOS */
137 CONS_TO_INTEGER (Fcdr (fdpid
), pid_t
, pid
);
139 if (call_process_exited
)
145 if (EMACS_KILLPG (pid
, SIGINT
) == 0)
147 ptrdiff_t count
= SPECPDL_INDEX ();
148 record_unwind_protect (call_process_kill
, fdpid
);
149 message1 ("Waiting for process to die...(type C-g again to kill it instantly)");
152 wait_for_termination (pid
);
154 specpdl_ptr
= specpdl
+ count
; /* Discard the unwind protect. */
155 message1 ("Waiting for process to die...done");
157 synch_process_alive
= 0;
159 #endif /* not MSDOS */
163 DEFUN ("call-process", Fcall_process
, Scall_process
, 1, MANY
, 0,
164 doc
: /* Call PROGRAM synchronously in separate process.
165 The remaining arguments are optional.
166 The program's input comes from file INFILE (nil means `/dev/null').
167 Insert output in BUFFER before point; t means current buffer; nil for BUFFER
168 means discard it; 0 means discard and don't wait; and `(:file FILE)', where
169 FILE is a file name string, means that it should be written to that file
170 \(if the file already exists it is overwritten).
171 BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case,
172 REAL-BUFFER says what to do with standard output, as above,
173 while STDERR-FILE says what to do with standard error in the child.
174 STDERR-FILE may be nil (discard standard error output),
175 t (mix it with ordinary output), or a file name string.
177 Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted.
178 Remaining arguments are strings passed as command arguments to PROGRAM.
180 If executable PROGRAM can't be found as an executable, `call-process'
181 signals a Lisp error. `call-process' reports errors in execution of
182 the program only through its return and output.
184 If BUFFER is 0, `call-process' returns immediately with value nil.
185 Otherwise it waits for PROGRAM to terminate
186 and returns a numeric exit status or a signal description string.
187 If you quit, the process is killed with SIGINT, or SIGKILL if you quit again.
189 usage: (call-process PROGRAM &optional INFILE BUFFER DISPLAY &rest ARGS) */)
190 (ptrdiff_t nargs
, Lisp_Object
*args
)
192 Lisp_Object infile
, buffer
, current_dir
, path
, cleanup_info_tail
;
196 #define CALLPROC_BUFFER_SIZE_MIN (16 * 1024)
197 #define CALLPROC_BUFFER_SIZE_MAX (4 * CALLPROC_BUFFER_SIZE_MIN)
198 char buf
[CALLPROC_BUFFER_SIZE_MAX
];
199 int bufsize
= CALLPROC_BUFFER_SIZE_MIN
;
200 ptrdiff_t count
= SPECPDL_INDEX ();
203 register const unsigned char **new_argv
;
204 /* File to use for stderr in the child.
205 t means use same as standard output. */
206 Lisp_Object error_file
;
207 Lisp_Object output_file
= Qnil
;
208 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
209 char *outf
, *tempfile
= NULL
;
216 struct coding_system process_coding
; /* coding-system of process output */
217 struct coding_system argument_coding
; /* coding-system of arguments */
218 /* Set to the return value of Ffind_operation_coding_system. */
219 Lisp_Object coding_systems
;
220 int output_to_buffer
= 1;
222 /* Qt denotes that Ffind_operation_coding_system is not yet called. */
225 CHECK_STRING (args
[0]);
230 /* Without asynchronous processes we cannot have BUFFER == 0. */
232 && (INTEGERP (CONSP (args
[2]) ? XCAR (args
[2]) : args
[2])))
233 error ("Operating system cannot handle asynchronous subprocesses");
234 #endif /* subprocesses */
236 /* Decide the coding-system for giving arguments. */
238 Lisp_Object val
, *args2
;
241 /* If arguments are supplied, we may have to encode them. */
245 Lisp_Object coding_attrs
;
247 for (i
= 4; i
< nargs
; i
++)
248 CHECK_STRING (args
[i
]);
250 for (i
= 4; i
< nargs
; i
++)
251 if (STRING_MULTIBYTE (args
[i
]))
254 if (!NILP (Vcoding_system_for_write
))
255 val
= Vcoding_system_for_write
;
256 else if (! must_encode
)
260 SAFE_NALLOCA (args2
, 1, nargs
+ 1);
261 args2
[0] = Qcall_process
;
262 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
263 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
264 val
= CONSP (coding_systems
) ? XCDR (coding_systems
) : Qnil
;
266 val
= complement_process_encoding_system (val
);
267 setup_coding_system (Fcheck_coding_system (val
), &argument_coding
);
268 coding_attrs
= CODING_ID_ATTRS (argument_coding
.id
);
269 if (NILP (CODING_ATTR_ASCII_COMPAT (coding_attrs
)))
271 /* We should not use an ASCII incompatible coding system. */
272 val
= raw_text_coding_system (val
);
273 setup_coding_system (val
, &argument_coding
);
278 if (nargs
>= 2 && ! NILP (args
[1]))
280 infile
= Fexpand_file_name (args
[1], BVAR (current_buffer
, directory
));
281 CHECK_STRING (infile
);
284 infile
= build_string (NULL_DEVICE
);
290 /* If BUFFER is a list, its meaning is (BUFFER-FOR-STDOUT
291 FILE-FOR-STDERR), unless the first element is :file, in which case see
292 the next paragraph. */
294 && (! SYMBOLP (XCAR (buffer
))
295 || strcmp (SSDATA (SYMBOL_NAME (XCAR (buffer
))), ":file")))
297 if (CONSP (XCDR (buffer
)))
299 Lisp_Object stderr_file
;
300 stderr_file
= XCAR (XCDR (buffer
));
302 if (NILP (stderr_file
) || EQ (Qt
, stderr_file
))
303 error_file
= stderr_file
;
305 error_file
= Fexpand_file_name (stderr_file
, Qnil
);
308 buffer
= XCAR (buffer
);
311 /* If the buffer is (still) a list, it might be a (:file "file") spec. */
313 && SYMBOLP (XCAR (buffer
))
314 && ! strcmp (SSDATA (SYMBOL_NAME (XCAR (buffer
))), ":file"))
316 output_file
= Fexpand_file_name (XCAR (XCDR (buffer
)),
317 BVAR (current_buffer
, directory
));
318 CHECK_STRING (output_file
);
322 if (!(EQ (buffer
, Qnil
)
324 || INTEGERP (buffer
)))
326 Lisp_Object spec_buffer
;
327 spec_buffer
= buffer
;
328 buffer
= Fget_buffer_create (buffer
);
329 /* Mention the buffer name for a better error message. */
331 CHECK_BUFFER (spec_buffer
);
332 CHECK_BUFFER (buffer
);
338 /* Make sure that the child will be able to chdir to the current
339 buffer's current directory, or its unhandled equivalent. We
340 can't just have the child check for an error when it does the
341 chdir, since it's in a vfork.
343 We have to GCPRO around this because Fexpand_file_name,
344 Funhandled_file_name_directory, and Ffile_accessible_directory_p
345 might call a file name handling function. The argument list is
346 protected by the caller, so all we really have to worry about is
349 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
351 current_dir
= BVAR (current_buffer
, directory
);
353 GCPRO5 (infile
, buffer
, current_dir
, error_file
, output_file
);
355 current_dir
= Funhandled_file_name_directory (current_dir
);
356 if (NILP (current_dir
))
357 /* If the file name handler says that current_dir is unreachable, use
358 a sensible default. */
359 current_dir
= build_string ("~/");
360 current_dir
= expand_and_dir_to_file (current_dir
, Qnil
);
361 current_dir
= Ffile_name_as_directory (current_dir
);
363 if (NILP (Ffile_accessible_directory_p (current_dir
)))
364 report_file_error ("Setting current directory",
365 Fcons (BVAR (current_buffer
, directory
), Qnil
));
367 if (STRING_MULTIBYTE (infile
))
368 infile
= ENCODE_FILE (infile
);
369 if (STRING_MULTIBYTE (current_dir
))
370 current_dir
= ENCODE_FILE (current_dir
);
371 if (STRINGP (error_file
) && STRING_MULTIBYTE (error_file
))
372 error_file
= ENCODE_FILE (error_file
);
373 if (STRINGP (output_file
) && STRING_MULTIBYTE (output_file
))
374 output_file
= ENCODE_FILE (output_file
);
378 display_p
= INTERACTIVE
&& nargs
>= 4 && !NILP (args
[3]);
380 filefd
= emacs_open (SSDATA (infile
), O_RDONLY
, 0);
383 infile
= DECODE_FILE (infile
);
384 report_file_error ("Opening process input file", Fcons (infile
, Qnil
));
387 if (STRINGP (output_file
))
390 fd_output
= emacs_open (SSDATA (output_file
),
391 O_WRONLY
| O_TRUNC
| O_CREAT
| O_TEXT
,
393 #else /* not DOS_NT */
394 fd_output
= creat (SSDATA (output_file
), 0666);
395 #endif /* not DOS_NT */
398 output_file
= DECODE_FILE (output_file
);
399 report_file_error ("Opening process output file",
400 Fcons (output_file
, Qnil
));
402 if (STRINGP (error_file
) || NILP (error_file
))
403 output_to_buffer
= 0;
406 /* Search for program; barf if not found. */
408 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
410 GCPRO4 (infile
, buffer
, current_dir
, error_file
);
411 openp (Vexec_path
, args
[0], Vexec_suffixes
, &path
, make_number (X_OK
));
416 emacs_close (filefd
);
417 report_file_error ("Searching for program", Fcons (args
[0], Qnil
));
420 /* If program file name starts with /: for quoting a magic name,
422 if (SBYTES (path
) > 2 && SREF (path
, 0) == '/'
423 && SREF (path
, 1) == ':')
424 path
= Fsubstring (path
, make_number (2), Qnil
);
426 SAFE_ALLOCA (new_argv
, const unsigned char **,
427 (nargs
> 4 ? nargs
- 2 : 2) * sizeof *new_argv
);
431 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
433 GCPRO5 (infile
, buffer
, current_dir
, path
, error_file
);
434 argument_coding
.dst_multibyte
= 0;
435 for (i
= 4; i
< nargs
; i
++)
437 argument_coding
.src_multibyte
= STRING_MULTIBYTE (args
[i
]);
438 if (CODING_REQUIRE_ENCODING (&argument_coding
))
439 /* We must encode this argument. */
440 args
[i
] = encode_coding_string (&argument_coding
, args
[i
], 1);
443 for (i
= 4; i
< nargs
; i
++)
444 new_argv
[i
- 3] = SDATA (args
[i
]);
449 new_argv
[0] = SDATA (path
);
451 #ifdef MSDOS /* MW, July 1993 */
453 /* If we're redirecting STDOUT to a file, that file is already open
457 if ((outf
= egetenv ("TMPDIR")))
458 strcpy (tempfile
= alloca (strlen (outf
) + 20), outf
);
461 tempfile
= alloca (20);
464 dostounix_filename (tempfile
);
465 if (*tempfile
== '\0' || tempfile
[strlen (tempfile
) - 1] != '/')
466 strcat (tempfile
, "/");
467 strcat (tempfile
, "detmp.XXX");
469 outfilefd
= creat (tempfile
, S_IREAD
| S_IWRITE
);
471 emacs_close (filefd
);
472 report_file_error ("Opening process output file",
473 Fcons (build_string (tempfile
), Qnil
));
477 outfilefd
= fd_output
;
482 if (INTEGERP (buffer
))
483 fd
[1] = emacs_open (NULL_DEVICE
, O_WRONLY
, 0), fd
[0] = -1;
490 emacs_close (filefd
);
491 report_file_error ("Creating process pipe", Qnil
);
497 /* child_setup must clobber environ in systems with true vfork.
498 Protect it from permanent change. */
499 register char **save_environ
= environ
;
500 register int fd1
= fd
[1];
502 #ifdef HAVE_WORKING_VFORK
505 struct sigaction sigpipe_action
;
510 #if 0 /* Some systems don't have sigblock. */
511 mask
= sigblock (sigmask (SIGCHLD
));
514 /* Record that we're about to create a synchronous process. */
515 synch_process_alive
= 1;
517 /* These vars record information from process termination.
518 Clear them now before process can possibly terminate,
519 to avoid timing error if process terminates soon. */
520 synch_process_death
= 0;
521 synch_process_retcode
= 0;
522 synch_process_termsig
= 0;
524 if (NILP (error_file
))
525 fd_error
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
526 else if (STRINGP (error_file
))
529 fd_error
= emacs_open (SSDATA (error_file
),
530 O_WRONLY
| O_TRUNC
| O_CREAT
| O_TEXT
,
532 #else /* not DOS_NT */
533 fd_error
= creat (SSDATA (error_file
), 0666);
534 #endif /* not DOS_NT */
539 emacs_close (filefd
);
547 if (NILP (error_file
))
548 error_file
= build_string (NULL_DEVICE
);
549 else if (STRINGP (error_file
))
550 error_file
= DECODE_FILE (error_file
);
551 report_file_error ("Cannot redirect stderr", Fcons (error_file
, Qnil
));
554 #ifdef MSDOS /* MW, July 1993 */
555 /* Note that on MSDOS `child_setup' actually returns the child process
556 exit status, not its PID, so we assign it to `synch_process_retcode'
558 pid
= child_setup (filefd
, outfilefd
, fd_error
, (char **) new_argv
,
561 /* Record that the synchronous process exited and note its
562 termination status. */
563 synch_process_alive
= 0;
564 synch_process_retcode
= pid
;
565 if (synch_process_retcode
< 0) /* means it couldn't be exec'ed */
567 synchronize_system_messages_locale ();
568 synch_process_death
= strerror (errno
);
571 emacs_close (outfilefd
);
572 if (fd_error
!= outfilefd
)
573 emacs_close (fd_error
);
574 fd1
= -1; /* No harm in closing that one! */
577 /* Since CRLF is converted to LF within `decode_coding', we
578 can always open a file with binary mode. */
579 fd
[0] = emacs_open (tempfile
, O_RDONLY
| O_BINARY
, 0);
583 emacs_close (filefd
);
584 report_file_error ("Cannot re-open temporary file",
585 Fcons (build_string (tempfile
), Qnil
));
589 fd
[0] = -1; /* We are not going to read from tempfile. */
590 #else /* not MSDOS */
592 pid
= child_setup (filefd
, fd1
, fd_error
, (char **) new_argv
,
594 #else /* not WINDOWSNT */
596 #ifdef HAVE_WORKING_VFORK
597 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
598 this sets the parent's signal handlers as well as the child's.
599 So delay all interrupts whose handlers the child might munge,
600 and record the current handlers so they can be restored later. */
601 sigemptyset (&blocked
);
602 sigaddset (&blocked
, SIGPIPE
);
603 sigaction (SIGPIPE
, 0, &sigpipe_action
);
604 pthread_sigmask (SIG_BLOCK
, &blocked
, &procmask
);
609 /* vfork, and prevent local vars from being clobbered by the vfork. */
611 Lisp_Object
volatile buffer_volatile
= buffer
;
612 Lisp_Object
volatile coding_systems_volatile
= coding_systems
;
613 Lisp_Object
volatile current_dir_volatile
= current_dir
;
614 int volatile display_p_volatile
= display_p
;
615 int volatile fd1_volatile
= fd1
;
616 int volatile fd_error_volatile
= fd_error
;
617 int volatile fd_output_volatile
= fd_output
;
618 int volatile output_to_buffer_volatile
= output_to_buffer
;
619 int volatile sa_must_free_volatile
= sa_must_free
;
620 ptrdiff_t volatile sa_count_volatile
= sa_count
;
621 unsigned char const **volatile new_argv_volatile
= new_argv
;
625 buffer
= buffer_volatile
;
626 coding_systems
= coding_systems_volatile
;
627 current_dir
= current_dir_volatile
;
628 display_p
= display_p_volatile
;
630 fd_error
= fd_error_volatile
;
631 fd_output
= fd_output_volatile
;
632 output_to_buffer
= output_to_buffer_volatile
;
633 sa_must_free
= sa_must_free_volatile
;
634 sa_count
= sa_count_volatile
;
635 new_argv
= new_argv_volatile
;
651 /* GConf causes us to ignore SIGPIPE, make sure it is restored
653 signal (SIGPIPE
, SIG_DFL
);
654 #ifdef HAVE_WORKING_VFORK
655 pthread_sigmask (SIG_SETMASK
, &procmask
, 0);
658 child_setup (filefd
, fd1
, fd_error
, (char **) new_argv
,
664 #ifdef HAVE_WORKING_VFORK
665 /* Restore the signal state. */
666 sigaction (SIGPIPE
, &sigpipe_action
, 0);
667 pthread_sigmask (SIG_SETMASK
, &procmask
, 0);
670 #endif /* not WINDOWSNT */
672 /* The MSDOS case did this already. */
674 emacs_close (fd_error
);
675 #endif /* not MSDOS */
677 environ
= save_environ
;
679 /* Close most of our fd's, but not fd[0]
680 since we will use that to read input from. */
681 emacs_close (filefd
);
683 emacs_close (fd_output
);
684 if (fd1
>= 0 && fd1
!= fd_error
)
692 report_file_error ("Doing vfork", Qnil
);
695 if (INTEGERP (buffer
))
702 /* Enable sending signal if user quits below. */
703 call_process_exited
= 0;
706 /* MSDOS needs different cleanup information. */
707 cleanup_info_tail
= build_string (tempfile
? tempfile
: "");
709 cleanup_info_tail
= INTEGER_TO_CONS (pid
);
710 #endif /* not MSDOS */
711 record_unwind_protect (call_process_cleanup
,
712 Fcons (Fcurrent_buffer (),
713 Fcons (INTEGER_TO_CONS (fd
[0]),
714 cleanup_info_tail
)));
716 if (BUFFERP (buffer
))
717 Fset_buffer (buffer
);
721 /* If BUFFER is nil, we must read process output once and then
722 discard it, so setup coding system but with nil. */
723 setup_coding_system (Qnil
, &process_coding
);
724 process_coding
.dst_multibyte
= 0;
728 Lisp_Object val
, *args2
;
731 if (!NILP (Vcoding_system_for_read
))
732 val
= Vcoding_system_for_read
;
735 if (EQ (coding_systems
, Qt
))
739 SAFE_NALLOCA (args2
, 1, nargs
+ 1);
740 args2
[0] = Qcall_process
;
741 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
743 = Ffind_operation_coding_system (nargs
+ 1, args2
);
745 if (CONSP (coding_systems
))
746 val
= XCAR (coding_systems
);
747 else if (CONSP (Vdefault_process_coding_system
))
748 val
= XCAR (Vdefault_process_coding_system
);
752 Fcheck_coding_system (val
);
753 /* In unibyte mode, character code conversion should not take
754 place but EOL conversion should. So, setup raw-text or one
755 of the subsidiary according to the information just setup. */
756 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
758 val
= raw_text_coding_system (val
);
759 setup_coding_system (val
, &process_coding
);
760 process_coding
.dst_multibyte
761 = ! NILP (BVAR (current_buffer
, enable_multibyte_characters
));
763 process_coding
.src_multibyte
= 0;
768 if (output_to_buffer
)
772 EMACS_INT total_read
= 0;
774 int display_on_the_fly
= display_p
;
775 struct coding_system saved_coding
;
777 saved_coding
= process_coding
;
780 /* Repeatedly read until we've filled as much as possible
781 of the buffer size we have. But don't read
782 less than 1024--save that for the next bufferful. */
784 while (nread
< bufsize
- 1024)
786 int this_read
= emacs_read (fd
[0], buf
+ nread
,
794 process_coding
.mode
|= CODING_MODE_LAST_BLOCK
;
799 total_read
+= this_read
;
801 if (display_on_the_fly
)
805 /* Now NREAD is the total amount of data in the buffer. */
810 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
811 && ! CODING_MAY_REQUIRE_DECODING (&process_coding
))
812 insert_1_both (buf
, nread
, nread
, 0, 1, 0);
814 { /* We have to decode the input. */
816 ptrdiff_t count1
= SPECPDL_INDEX ();
818 XSETBUFFER (curbuf
, current_buffer
);
819 /* We cannot allow after-change-functions be run
820 during decoding, because that might modify the
821 buffer, while we rely on process_coding.produced to
822 faithfully reflect inserted text until we
823 TEMP_SET_PT_BOTH below. */
824 specbind (Qinhibit_modification_hooks
, Qt
);
825 decode_coding_c_string (&process_coding
,
826 (unsigned char *) buf
, nread
, curbuf
);
827 unbind_to (count1
, Qnil
);
828 if (display_on_the_fly
829 && CODING_REQUIRE_DETECTION (&saved_coding
)
830 && ! CODING_REQUIRE_DETECTION (&process_coding
))
832 /* We have detected some coding system. But,
833 there's a possibility that the detection was
834 done by insufficient data. So, we give up
835 displaying on the fly. */
836 if (process_coding
.produced
> 0)
837 del_range_2 (process_coding
.dst_pos
,
838 process_coding
.dst_pos_byte
,
839 process_coding
.dst_pos
840 + process_coding
.produced_char
,
841 process_coding
.dst_pos_byte
842 + process_coding
.produced
, 0);
843 display_on_the_fly
= 0;
844 process_coding
= saved_coding
;
846 /* This is to make the above condition always
847 fails in the future. */
848 saved_coding
.common_flags
849 &= ~CODING_REQUIRE_DETECTION_MASK
;
853 TEMP_SET_PT_BOTH (PT
+ process_coding
.produced_char
,
854 PT_BYTE
+ process_coding
.produced
);
855 carryover
= process_coding
.carryover_bytes
;
857 memcpy (buf
, process_coding
.carryover
,
858 process_coding
.carryover_bytes
);
862 if (process_coding
.mode
& CODING_MODE_LAST_BLOCK
)
865 /* Make the buffer bigger as we continue to read more data,
866 but not past CALLPROC_BUFFER_SIZE_MAX. */
867 if (bufsize
< CALLPROC_BUFFER_SIZE_MAX
&& total_read
> 32 * bufsize
)
868 if ((bufsize
*= 2) > CALLPROC_BUFFER_SIZE_MAX
)
869 bufsize
= CALLPROC_BUFFER_SIZE_MAX
;
874 prepare_menu_bars ();
876 redisplay_preserve_echo_area (1);
877 /* This variable might have been set to 0 for code
878 detection. In that case, we set it back to 1 because
879 we should have already detected a coding system. */
880 display_on_the_fly
= 1;
887 Vlast_coding_system_used
= CODING_ID_NAME (process_coding
.id
);
888 /* If the caller required, let the buffer inherit the
889 coding-system used to decode the process output. */
890 if (inherit_process_coding_system
)
891 call1 (intern ("after-insert-file-set-buffer-file-coding-system"),
892 make_number (total_read
));
896 /* Wait for it to terminate, unless it already has. */
897 if (output_to_buffer
)
898 wait_for_termination (pid
);
900 interruptible_wait_for_termination (pid
);
905 /* Don't kill any children that the subprocess may have left behind
907 call_process_exited
= 1;
910 unbind_to (count
, Qnil
);
912 if (synch_process_termsig
)
916 synchronize_system_messages_locale ();
917 signame
= strsignal (synch_process_termsig
);
922 synch_process_death
= signame
;
925 if (synch_process_death
)
926 return code_convert_string_norecord (build_string (synch_process_death
),
927 Vlocale_coding_system
, 0);
928 return make_number (synch_process_retcode
);
932 delete_temp_file (Lisp_Object name
)
934 /* Suppress jka-compr handling, etc. */
935 ptrdiff_t count
= SPECPDL_INDEX ();
936 specbind (intern ("file-name-handler-alist"), Qnil
);
937 internal_delete_file (name
);
938 unbind_to (count
, Qnil
);
942 DEFUN ("call-process-region", Fcall_process_region
, Scall_process_region
,
944 doc
: /* Send text from START to END to a synchronous process running PROGRAM.
945 The remaining arguments are optional.
946 Delete the text if fourth arg DELETE is non-nil.
948 Insert output in BUFFER before point; t means current buffer; nil for
949 BUFFER means discard it; 0 means discard and don't wait; and `(:file
950 FILE)', where FILE is a file name string, means that it should be
951 written to that file (if the file already exists it is overwritten).
952 BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case,
953 REAL-BUFFER says what to do with standard output, as above,
954 while STDERR-FILE says what to do with standard error in the child.
955 STDERR-FILE may be nil (discard standard error output),
956 t (mix it with ordinary output), or a file name string.
958 Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted.
959 Remaining args are passed to PROGRAM at startup as command args.
961 If BUFFER is 0, `call-process-region' returns immediately with value nil.
962 Otherwise it waits for PROGRAM to terminate
963 and returns a numeric exit status or a signal description string.
964 If you quit, the process is killed with SIGINT, or SIGKILL if you quit again.
966 usage: (call-process-region START END PROGRAM &optional DELETE BUFFER DISPLAY &rest ARGS) */)
967 (ptrdiff_t nargs
, Lisp_Object
*args
)
970 Lisp_Object filename_string
;
971 register Lisp_Object start
, end
;
972 ptrdiff_t count
= SPECPDL_INDEX ();
973 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
974 Lisp_Object coding_systems
;
975 Lisp_Object val
, *args2
;
978 Lisp_Object tmpdir
, pattern
;
980 if (STRINGP (Vtemporary_file_directory
))
981 tmpdir
= Vtemporary_file_directory
;
985 if (getenv ("TMPDIR"))
986 tmpdir
= build_string (getenv ("TMPDIR"));
988 tmpdir
= build_string ("/tmp/");
991 if ((outf
= egetenv ("TMPDIR"))
992 || (outf
= egetenv ("TMP"))
993 || (outf
= egetenv ("TEMP")))
994 tmpdir
= build_string (outf
);
996 tmpdir
= Ffile_name_as_directory (build_string ("c:/temp"));
1002 pattern
= Fexpand_file_name (Vtemp_file_name_pattern
, tmpdir
);
1003 SAFE_ALLOCA (tempfile
, char *, SBYTES (pattern
) + 1);
1004 memcpy (tempfile
, SDATA (pattern
), SBYTES (pattern
) + 1);
1005 coding_systems
= Qt
;
1012 fd
= mkstemp (tempfile
);
1015 report_file_error ("Failed to open temporary file",
1016 Fcons (build_string (tempfile
), Qnil
));
1024 filename_string
= build_string (tempfile
);
1025 GCPRO1 (filename_string
);
1031 /* Decide coding-system of the contents of the temporary file. */
1032 if (!NILP (Vcoding_system_for_write
))
1033 val
= Vcoding_system_for_write
;
1034 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
1039 SAFE_NALLOCA (args2
, 1, nargs
+ 1);
1040 args2
[0] = Qcall_process_region
;
1041 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1042 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1043 val
= CONSP (coding_systems
) ? XCDR (coding_systems
) : Qnil
;
1046 val
= complement_process_encoding_system (val
);
1049 ptrdiff_t count1
= SPECPDL_INDEX ();
1051 specbind (intern ("coding-system-for-write"), val
);
1052 /* POSIX lets mk[s]temp use "."; don't invoke jka-compr if we
1053 happen to get a ".Z" suffix. */
1054 specbind (intern ("file-name-handler-alist"), Qnil
);
1055 Fwrite_region (start
, end
, filename_string
, Qnil
, Qlambda
, Qnil
, Qnil
);
1057 unbind_to (count1
, Qnil
);
1060 /* Note that Fcall_process takes care of binding
1061 coding-system-for-read. */
1063 record_unwind_protect (delete_temp_file
, filename_string
);
1065 if (nargs
> 3 && !NILP (args
[3]))
1066 Fdelete_region (start
, end
);
1078 args
[1] = filename_string
;
1080 RETURN_UNGCPRO (unbind_to (count
, Fcall_process (nargs
, args
)));
1084 static int relocate_fd (int fd
, int minfd
);
1088 add_env (char **env
, char **new_env
, char *string
)
1095 /* See if this string duplicates any string already in the env.
1096 If so, don't put it in.
1097 When an env var has multiple definitions,
1098 we keep the definition that comes first in process-environment. */
1099 for (ep
= env
; ok
&& ep
!= new_env
; ep
++)
1101 char *p
= *ep
, *q
= string
;
1107 /* The string is a lone variable name; keep it for now, we
1108 will remove it later. It is a placeholder for a
1109 variable that is not to be included in the environment. */
1117 *new_env
++ = string
;
1121 /* This is the last thing run in a newly forked inferior
1122 either synchronous or asynchronous.
1123 Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2.
1124 Initialize inferior's priority, pgrp, connected dir and environment.
1125 then exec another program based on new_argv.
1127 This function may change environ for the superior process.
1128 Therefore, the superior process must save and restore the value
1129 of environ around the vfork and the call to this function.
1131 SET_PGRP is nonzero if we should put the subprocess into a separate
1134 CURRENT_DIR is an elisp string giving the path of the current
1135 directory the subprocess should have. Since we can't really signal
1136 a decent error from within the child, this should be verified as an
1137 executable directory by the parent. */
1140 child_setup (int in
, int out
, int err
, register char **new_argv
, int set_pgrp
, Lisp_Object current_dir
)
1147 #endif /* WINDOWSNT */
1149 pid_t pid
= getpid ();
1151 /* Close Emacs's descriptors that this process should not have. */
1152 close_process_descs ();
1154 /* DOS_NT isn't in a vfork, so if we are in the middle of load-file,
1155 we will lose if we call close_load_descs here. */
1157 close_load_descs ();
1160 /* Note that use of alloca is always safe here. It's obvious for systems
1161 that do not have true vfork or that have true (stack) alloca.
1162 If using vfork and C_ALLOCA (when Emacs used to include
1163 src/alloca.c) it is safe because that changes the superior's
1164 static variables as if the superior had done alloca and will be
1165 cleaned up in the usual way. */
1167 register char *temp
;
1168 size_t i
; /* size_t, because ptrdiff_t might overflow here! */
1170 i
= SBYTES (current_dir
);
1172 /* MSDOS must have all environment variables malloc'ed, because
1173 low-level libc functions that launch subsidiary processes rely
1175 pwd_var
= xmalloc (i
+ 6);
1177 pwd_var
= alloca (i
+ 6);
1180 memcpy (pwd_var
, "PWD=", 4);
1181 memcpy (temp
, SDATA (current_dir
), i
);
1182 if (!IS_DIRECTORY_SEP (temp
[i
- 1])) temp
[i
++] = DIRECTORY_SEP
;
1186 /* We can't signal an Elisp error here; we're in a vfork. Since
1187 the callers check the current directory before forking, this
1188 should only return an error if the directory's permissions
1189 are changed between the check and this chdir, but we should
1191 if (chdir (temp
) < 0)
1194 /* Get past the drive letter, so that d:/ is left alone. */
1195 if (i
> 2 && IS_DEVICE_SEP (temp
[1]) && IS_DIRECTORY_SEP (temp
[2]))
1202 /* Strip trailing slashes for PWD, but leave "/" and "//" alone. */
1203 while (i
> 2 && IS_DIRECTORY_SEP (temp
[i
- 1]))
1207 /* Set `env' to a vector of the strings in the environment. */
1209 register Lisp_Object tem
;
1210 register char **new_env
;
1212 register int new_length
;
1213 Lisp_Object display
= Qnil
;
1217 for (tem
= Vprocess_environment
;
1218 CONSP (tem
) && STRINGP (XCAR (tem
));
1221 if (strncmp (SSDATA (XCAR (tem
)), "DISPLAY", 7) == 0
1222 && (SDATA (XCAR (tem
)) [7] == '\0'
1223 || SDATA (XCAR (tem
)) [7] == '='))
1224 /* DISPLAY is specified in process-environment. */
1229 /* If not provided yet, use the frame's DISPLAY. */
1232 Lisp_Object tmp
= Fframe_parameter (selected_frame
, Qdisplay
);
1233 if (!STRINGP (tmp
) && CONSP (Vinitial_environment
))
1234 /* If still not found, Look for DISPLAY in Vinitial_environment. */
1235 tmp
= Fgetenv_internal (build_string ("DISPLAY"),
1236 Vinitial_environment
);
1244 /* new_length + 2 to include PWD and terminating 0. */
1245 env
= new_env
= alloca ((new_length
+ 2) * sizeof *env
);
1246 /* If we have a PWD envvar, pass one down,
1247 but with corrected value. */
1248 if (egetenv ("PWD"))
1249 *new_env
++ = pwd_var
;
1251 if (STRINGP (display
))
1253 char *vdata
= alloca (sizeof "DISPLAY=" + SBYTES (display
));
1254 strcpy (vdata
, "DISPLAY=");
1255 strcat (vdata
, SSDATA (display
));
1256 new_env
= add_env (env
, new_env
, vdata
);
1260 for (tem
= Vprocess_environment
;
1261 CONSP (tem
) && STRINGP (XCAR (tem
));
1263 new_env
= add_env (env
, new_env
, SSDATA (XCAR (tem
)));
1267 /* Remove variable names without values. */
1271 while (*q
!= 0 && strchr (*q
, '=') == NULL
)
1281 prepare_standard_handles (in
, out
, err
, handles
);
1282 set_process_dir (SDATA (current_dir
));
1283 /* Spawn the child. (See ntproc.c:Spawnve). */
1284 cpid
= spawnve (_P_NOWAIT
, new_argv
[0], new_argv
, env
);
1285 reset_standard_handles (in
, out
, err
, handles
);
1287 /* An error occurred while trying to spawn the process. */
1288 report_file_error ("Spawning child process", Qnil
);
1291 #else /* not WINDOWSNT */
1292 /* Make sure that in, out, and err are not actually already in
1293 descriptors zero, one, or two; this could happen if Emacs is
1294 started with its standard in, out, or error closed, as might
1297 int oin
= in
, oout
= out
;
1299 /* We have to avoid relocating the same descriptor twice! */
1301 in
= relocate_fd (in
, 3);
1306 out
= relocate_fd (out
, 3);
1310 else if (err
== oout
)
1313 err
= relocate_fd (err
, 3);
1327 if (err
!= in
&& err
!= out
)
1331 #ifndef SETPGRP_RELEASES_CTTY
1332 setpgrp (); /* No arguments but equivalent in this case */
1336 #endif /* not USG */
1338 /* setpgrp_of_tty is incorrect here; it uses input_fd. */
1341 /* execvp does not accept an environment arg so the only way
1342 to pass this environment is to set environ. Our caller
1343 is responsible for restoring the ambient value of environ. */
1345 execvp (new_argv
[0], new_argv
);
1347 emacs_write (1, "Can't exec program: ", 20);
1348 emacs_write (1, new_argv
[0], strlen (new_argv
[0]));
1349 emacs_write (1, "\n", 1);
1353 pid
= run_msdos_command (new_argv
, pwd_var
+ 4, in
, out
, err
, env
);
1356 /* An error occurred while trying to run the subprocess. */
1357 report_file_error ("Spawning child process", Qnil
);
1360 #endif /* not WINDOWSNT */
1364 /* Move the file descriptor FD so that its number is not less than MINFD.
1365 If the file descriptor is moved at all, the original is freed. */
1367 relocate_fd (int fd
, int minfd
)
1375 new = fcntl (fd
, F_DUPFD
, minfd
);
1379 /* Note that we hold the original FD open while we recurse,
1380 to guarantee we'll get a new FD if we need it. */
1381 new = relocate_fd (new, minfd
);
1385 const char *message_1
= "Error while setting up child: ";
1386 const char *errmessage
= strerror (errno
);
1387 const char *message_2
= "\n";
1388 emacs_write (2, message_1
, strlen (message_1
));
1389 emacs_write (2, errmessage
, strlen (errmessage
));
1390 emacs_write (2, message_2
, strlen (message_2
));
1397 #endif /* not WINDOWSNT */
1400 getenv_internal_1 (const char *var
, ptrdiff_t varlen
, char **value
,
1401 ptrdiff_t *valuelen
, Lisp_Object env
)
1403 for (; CONSP (env
); env
= XCDR (env
))
1405 Lisp_Object entry
= XCAR (env
);
1407 && SBYTES (entry
) >= varlen
1409 /* NT environment variables are case insensitive. */
1410 && ! strnicmp (SDATA (entry
), var
, varlen
)
1411 #else /* not WINDOWSNT */
1412 && ! memcmp (SDATA (entry
), var
, varlen
)
1413 #endif /* not WINDOWSNT */
1416 if (SBYTES (entry
) > varlen
&& SREF (entry
, varlen
) == '=')
1418 *value
= SSDATA (entry
) + (varlen
+ 1);
1419 *valuelen
= SBYTES (entry
) - (varlen
+ 1);
1422 else if (SBYTES (entry
) == varlen
)
1424 /* Lone variable names in Vprocess_environment mean that
1425 variable should be removed from the environment. */
1435 getenv_internal (const char *var
, ptrdiff_t varlen
, char **value
,
1436 ptrdiff_t *valuelen
, Lisp_Object frame
)
1438 /* Try to find VAR in Vprocess_environment first. */
1439 if (getenv_internal_1 (var
, varlen
, value
, valuelen
,
1440 Vprocess_environment
))
1441 return *value
? 1 : 0;
1443 /* For DISPLAY try to get the values from the frame or the initial env. */
1444 if (strcmp (var
, "DISPLAY") == 0)
1447 = Fframe_parameter (NILP (frame
) ? selected_frame
: frame
, Qdisplay
);
1448 if (STRINGP (display
))
1450 *value
= SSDATA (display
);
1451 *valuelen
= SBYTES (display
);
1454 /* If still not found, Look for DISPLAY in Vinitial_environment. */
1455 if (getenv_internal_1 (var
, varlen
, value
, valuelen
,
1456 Vinitial_environment
))
1457 return *value
? 1 : 0;
1463 DEFUN ("getenv-internal", Fgetenv_internal
, Sgetenv_internal
, 1, 2, 0,
1464 doc
: /* Get the value of environment variable VARIABLE.
1465 VARIABLE should be a string. Value is nil if VARIABLE is undefined in
1466 the environment. Otherwise, value is a string.
1468 This function searches `process-environment' for VARIABLE.
1470 If optional parameter ENV is a list, then search this list instead of
1471 `process-environment', and return t when encountering a negative entry
1472 \(an entry for a variable with no value). */)
1473 (Lisp_Object variable
, Lisp_Object env
)
1478 CHECK_STRING (variable
);
1481 if (getenv_internal_1 (SSDATA (variable
), SBYTES (variable
),
1482 &value
, &valuelen
, env
))
1483 return value
? make_string (value
, valuelen
) : Qt
;
1487 else if (getenv_internal (SSDATA (variable
), SBYTES (variable
),
1488 &value
, &valuelen
, env
))
1489 return make_string (value
, valuelen
);
1494 /* A version of getenv that consults the Lisp environment lists,
1495 easily callable from C. */
1497 egetenv (const char *var
)
1502 if (getenv_internal (var
, strlen (var
), &value
, &valuelen
, Qnil
))
1509 /* This is run before init_cmdargs. */
1512 init_callproc_1 (void)
1514 char *data_dir
= egetenv ("EMACSDATA");
1515 char *doc_dir
= egetenv ("EMACSDOC");
1518 = Ffile_name_as_directory (build_string (data_dir
? data_dir
1521 = Ffile_name_as_directory (build_string (doc_dir
? doc_dir
1524 /* Check the EMACSPATH environment variable, defaulting to the
1525 PATH_EXEC path from epaths.h. */
1526 Vexec_path
= decode_env_path ("EMACSPATH", PATH_EXEC
);
1527 Vexec_directory
= Ffile_name_as_directory (Fcar (Vexec_path
));
1528 Vexec_path
= nconc2 (decode_env_path ("PATH", ""), Vexec_path
);
1531 /* This is run after init_cmdargs, when Vinstallation_directory is valid. */
1534 init_callproc (void)
1536 char *data_dir
= egetenv ("EMACSDATA");
1539 Lisp_Object tempdir
;
1541 if (!NILP (Vinstallation_directory
))
1543 /* Add to the path the lib-src subdir of the installation dir. */
1545 tem
= Fexpand_file_name (build_string ("lib-src"),
1546 Vinstallation_directory
);
1548 /* MSDOS uses wrapped binaries, so don't do this. */
1549 if (NILP (Fmember (tem
, Vexec_path
)))
1551 Vexec_path
= decode_env_path ("EMACSPATH", PATH_EXEC
);
1552 Vexec_path
= Fcons (tem
, Vexec_path
);
1553 Vexec_path
= nconc2 (decode_env_path ("PATH", ""), Vexec_path
);
1556 Vexec_directory
= Ffile_name_as_directory (tem
);
1557 #endif /* not DOS_NT */
1559 /* Maybe use ../etc as well as ../lib-src. */
1562 tem
= Fexpand_file_name (build_string ("etc"),
1563 Vinstallation_directory
);
1564 Vdoc_directory
= Ffile_name_as_directory (tem
);
1568 /* Look for the files that should be in etc. We don't use
1569 Vinstallation_directory, because these files are never installed
1570 near the executable, and they are never in the build
1571 directory when that's different from the source directory.
1573 Instead, if these files are not in the nominal place, we try the
1574 source directory. */
1577 Lisp_Object tem
, tem1
, srcdir
;
1579 srcdir
= Fexpand_file_name (build_string ("../src/"),
1580 build_string (PATH_DUMPLOADSEARCH
));
1581 tem
= Fexpand_file_name (build_string ("GNU"), Vdata_directory
);
1582 tem1
= Ffile_exists_p (tem
);
1583 if (!NILP (Fequal (srcdir
, Vinvocation_directory
)) || NILP (tem1
))
1586 newdir
= Fexpand_file_name (build_string ("../etc/"),
1587 build_string (PATH_DUMPLOADSEARCH
));
1588 tem
= Fexpand_file_name (build_string ("GNU"), newdir
);
1589 tem1
= Ffile_exists_p (tem
);
1591 Vdata_directory
= newdir
;
1599 tempdir
= Fdirectory_file_name (Vexec_directory
);
1600 if (access (SSDATA (tempdir
), 0) < 0)
1601 dir_warning ("Warning: arch-dependent data dir (%s) does not exist.\n",
1605 tempdir
= Fdirectory_file_name (Vdata_directory
);
1606 if (access (SSDATA (tempdir
), 0) < 0)
1607 dir_warning ("Warning: arch-independent data dir (%s) does not exist.\n",
1610 sh
= (char *) getenv ("SHELL");
1611 Vshell_file_name
= build_string (sh
? sh
: "/bin/sh");
1614 Vshared_game_score_directory
= Qnil
;
1616 Vshared_game_score_directory
= build_string (PATH_GAME
);
1617 if (NILP (Ffile_directory_p (Vshared_game_score_directory
)))
1618 Vshared_game_score_directory
= Qnil
;
1623 set_initial_environment (void)
1626 for (envp
= environ
; *envp
; envp
++)
1627 Vprocess_environment
= Fcons (build_string (*envp
),
1628 Vprocess_environment
);
1629 /* Ideally, the `copy' shouldn't be necessary, but it seems it's frequent
1630 to use `delete' and friends on process-environment. */
1631 Vinitial_environment
= Fcopy_sequence (Vprocess_environment
);
1635 syms_of_callproc (void)
1638 Vtemp_file_name_pattern
= build_string ("emacsXXXXXX");
1639 #elif defined (WINDOWSNT)
1640 Vtemp_file_name_pattern
= build_string ("emXXXXXX");
1642 Vtemp_file_name_pattern
= build_string ("detmp.XXX");
1644 staticpro (&Vtemp_file_name_pattern
);
1646 DEFVAR_LISP ("shell-file-name", Vshell_file_name
,
1647 doc
: /* File name to load inferior shells from.
1648 Initialized from the SHELL environment variable, or to a system-dependent
1649 default if SHELL is not set. */);
1651 DEFVAR_LISP ("exec-path", Vexec_path
,
1652 doc
: /* List of directories to search programs to run in subprocesses.
1653 Each element is a string (directory name) or nil (try default directory). */);
1655 DEFVAR_LISP ("exec-suffixes", Vexec_suffixes
,
1656 doc
: /* List of suffixes to try to find executable file names.
1657 Each element is a string. */);
1658 Vexec_suffixes
= Qnil
;
1660 DEFVAR_LISP ("exec-directory", Vexec_directory
,
1661 doc
: /* Directory for executables for Emacs to invoke.
1662 More generally, this includes any architecture-dependent files
1663 that are built and installed from the Emacs distribution. */);
1665 DEFVAR_LISP ("data-directory", Vdata_directory
,
1666 doc
: /* Directory of machine-independent files that come with GNU Emacs.
1667 These are files intended for Emacs to use while it runs. */);
1669 DEFVAR_LISP ("doc-directory", Vdoc_directory
,
1670 doc
: /* Directory containing the DOC file that comes with GNU Emacs.
1671 This is usually the same as `data-directory'. */);
1673 DEFVAR_LISP ("configure-info-directory", Vconfigure_info_directory
,
1674 doc
: /* For internal use by the build procedure only.
1675 This is the name of the directory in which the build procedure installed
1676 Emacs's info files; the default value for `Info-default-directory-list'
1678 Vconfigure_info_directory
= build_string (PATH_INFO
);
1680 DEFVAR_LISP ("shared-game-score-directory", Vshared_game_score_directory
,
1681 doc
: /* Directory of score files for games which come with GNU Emacs.
1682 If this variable is nil, then Emacs is unable to use a shared directory. */);
1684 Vshared_game_score_directory
= Qnil
;
1686 Vshared_game_score_directory
= build_string (PATH_GAME
);
1689 DEFVAR_LISP ("initial-environment", Vinitial_environment
,
1690 doc
: /* List of environment variables inherited from the parent process.
1691 Each element should be a string of the form ENVVARNAME=VALUE.
1692 The elements must normally be decoded (using `locale-coding-system') for use. */);
1693 Vinitial_environment
= Qnil
;
1695 DEFVAR_LISP ("process-environment", Vprocess_environment
,
1696 doc
: /* List of overridden environment variables for subprocesses to inherit.
1697 Each element should be a string of the form ENVVARNAME=VALUE.
1699 Entries in this list take precedence to those in the frame-local
1700 environments. Therefore, let-binding `process-environment' is an easy
1701 way to temporarily change the value of an environment variable,
1702 irrespective of where it comes from. To use `process-environment' to
1703 remove an environment variable, include only its name in the list,
1706 This variable is set to nil when Emacs starts.
1708 If multiple entries define the same variable, the first one always
1711 Non-ASCII characters are encoded according to the initial value of
1712 `locale-coding-system', i.e. the elements must normally be decoded for
1715 See `setenv' and `getenv'. */);
1716 Vprocess_environment
= Qnil
;
1718 defsubr (&Scall_process
);
1719 defsubr (&Sgetenv_internal
);
1720 defsubr (&Scall_process_region
);